How do allergies work?
Use complete sentences and explain how it works in the body

The IgE antibodies bind to mast cells. The allergen cross-links them. This triggers the mast cells to release powerful chemicals like histamines. Histamines cause the allergic symptoms like itching and runny nose. If you are allergic to pollen, your body will produce a large amount of allergen-specific IgE antibodies when you come in contact with pollen. The IgE antibodies bind to mast cells. The allergen cross-links them. This triggers the mast cells to release powerful chemicals like histamines.

a perfect upbringing he will grow up to be healthy and confident adult.

again, you should probably take him to the vet. goodluck